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Title: Broadband (0-4 Hz) Ground Motions for a Magnitude 7.0 Hayward Fault Earthquake With Three-Dimensional Structure and Topography: An M 7 Hayward Fault Earthquake

We performed fully deterministic broadband (0–4 Hz) high-performance computing ground motion simulations of a magnitude 7.0 scenario earthquake on the Hayward Fault (HF) in the San Francisco Bay Area of Northern California. Simulations consider average one-dimensional (1-D) and three-dimensional (3-D) anelastic structure with flat and topographic free surfaces. Ground motion intensity measures (GMIMs) for the 3-D model display dramatic differences across the HF due to geologic heterogeneity, with low wave speeds east of the HF amplifying motions. The median GMIMs agree well with Ground Motion Prediction Equations (GMPEs); however, the 3-D model generates more scatter than the 1-D model. Ratios of 3-D/1-D GMIMs from the same source allow isolation of path and site effects for the 3-D model. These ratios show remarkably similar trends as site-specific factors for the GMPE predictions, suggesting that wave propagation effects in our 3-D simulations are on average consistent with empirical data.
Authors:
ORCiD logo [1] ;  [2] ; ORCiD logo [2] ;  [2] ;  [3]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Oakland, CA (United States)
Publication Date:
Report Number(s):
LLNL-JRNL-741500
Journal ID: ISSN 0094-8276; 896057
Grant/Contract Number:
AC52-07NA27344; 17-SC-20-SC
Type:
Published Article
Journal Name:
Geophysical Research Letters
Additional Journal Information:
Journal Volume: 45; Journal Issue: 2; Journal ID: ISSN 0094-8276
Publisher:
American Geophysical Union
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
58 GEOSCIENCES
OSTI Identifier:
1418697
Alternate Identifier(s):
OSTI ID: 1418699; OSTI ID: 1458635

Rodgers, Arthur J., Pitarka, Arben, Petersson, N. Anders, Sjogreen, Bjorn, and McCallen, David B.. Broadband (0-4 Hz) Ground Motions for a Magnitude 7.0 Hayward Fault Earthquake With Three-Dimensional Structure and Topography: An M 7 Hayward Fault Earthquake. United States: N. p., Web. doi:10.1002/2017GL076505.
Rodgers, Arthur J., Pitarka, Arben, Petersson, N. Anders, Sjogreen, Bjorn, & McCallen, David B.. Broadband (0-4 Hz) Ground Motions for a Magnitude 7.0 Hayward Fault Earthquake With Three-Dimensional Structure and Topography: An M 7 Hayward Fault Earthquake. United States. doi:10.1002/2017GL076505.
Rodgers, Arthur J., Pitarka, Arben, Petersson, N. Anders, Sjogreen, Bjorn, and McCallen, David B.. 2018. "Broadband (0-4 Hz) Ground Motions for a Magnitude 7.0 Hayward Fault Earthquake With Three-Dimensional Structure and Topography: An M 7 Hayward Fault Earthquake". United States. doi:10.1002/2017GL076505.
@article{osti_1418697,
title = {Broadband (0-4 Hz) Ground Motions for a Magnitude 7.0 Hayward Fault Earthquake With Three-Dimensional Structure and Topography: An M 7 Hayward Fault Earthquake},
author = {Rodgers, Arthur J. and Pitarka, Arben and Petersson, N. Anders and Sjogreen, Bjorn and McCallen, David B.},
abstractNote = {We performed fully deterministic broadband (0–4 Hz) high-performance computing ground motion simulations of a magnitude 7.0 scenario earthquake on the Hayward Fault (HF) in the San Francisco Bay Area of Northern California. Simulations consider average one-dimensional (1-D) and three-dimensional (3-D) anelastic structure with flat and topographic free surfaces. Ground motion intensity measures (GMIMs) for the 3-D model display dramatic differences across the HF due to geologic heterogeneity, with low wave speeds east of the HF amplifying motions. The median GMIMs agree well with Ground Motion Prediction Equations (GMPEs); however, the 3-D model generates more scatter than the 1-D model. Ratios of 3-D/1-D GMIMs from the same source allow isolation of path and site effects for the 3-D model. These ratios show remarkably similar trends as site-specific factors for the GMPE predictions, suggesting that wave propagation effects in our 3-D simulations are on average consistent with empirical data.},
doi = {10.1002/2017GL076505},
journal = {Geophysical Research Letters},
number = 2,
volume = 45,
place = {United States},
year = {2018},
month = {1}
}